CN106140827A - A kind of Cold-strip Steel Surface line bright defect control method - Google Patents
A kind of Cold-strip Steel Surface line bright defect control method Download PDFInfo
- Publication number
- CN106140827A CN106140827A CN201610590084.8A CN201610590084A CN106140827A CN 106140827 A CN106140827 A CN 106140827A CN 201610590084 A CN201610590084 A CN 201610590084A CN 106140827 A CN106140827 A CN 106140827A
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- Prior art keywords
- cold
- steel surface
- thickness
- strip steel
- control method
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
Abstract
The present invention relates to a kind of Cold-strip Steel Surface line bright defect control method, comprise the following steps: anti-tangle for frame baffle plate is opened to the interval of distance working roll more than 15mm；Seal point production is carried out after being fully opened by anti-tangle baffle plate；By the spray flow-control of frame emulsion 5500～6000L/min；Pressure distribution is controlled according to rolling strategy.This Cold-strip Steel Surface line bright defect control method is avoided that in cold-rolled process that belt steel surface produces without feel scratches visible, improves product quality.
Description
Technical field
The present invention relates to metal material processing technical field, particularly to a kind of Cold-strip Steel Surface line bright defect controlling party
Method.
Background technology
In recent years, along with cold-rolled products surface quality requirements is stepped up by user, the most high-level outside plate, heat treatment
Acid is rolled the surface requirements of finished products and is improved the most further by product line, and Cold-strip Steel Surface fleck defect is the coldest as one
Hard base board defect, has a strong impact on heat treatment and produces line strip surface quality, it is difficult to meet the requirement of high-level automobile exterior panel.
In the production process of Shoudu Iron and Steel Co flat cold-rolled sheet company limited pickling milling train Unit erriger, mainly more than surface grade FC
High-grade automobile exterior panel, frame working roll circumference frequently occurs together significantly entire body and scratches, and copy to belt steel surface
On, cause belt steel surface entire volume to there is the phenomenon without feel scratches visible, i.e. cause batch coil of strip to produce visible without feel sidelight
Bright line accident.When rolling about 8 coil volume after sometimes changing frame working roll and intermediate calender rolls (lengths per roll of tape substantially 2500m),
In identical position, similar bright line phenomenon can occur again.
The generation of bright line, not only affects strip surface quality, reduces product hierarchy and frequently takes the measure of roll change temporarily
Passively process, make the economic benefit of company suffer greater loss, had a strong impact on simultaneously normal rhythm of production, produce line technology and
The duty of operator.
Summary of the invention
The invention provides a kind of Cold-strip Steel Surface line bright defect control method, solve or part solves existing skill
In art, in the production process of pickling milling train Unit erriger there is the technical problem without feel scratches visible in belt steel surface, it is achieved that keeps away
Exempt from belt steel surface in cold-rolled process to produce without feel scratches visible, improve the technique effect of product quality.
A kind of Cold-strip Steel Surface line bright defect control method that the present invention provides, comprises the following steps:
Anti-tangle for frame baffle plate is opened to the interval of distance working roll more than 15mm；
Seal point production is carried out after being fully opened by described anti-tangle baffle plate；
By the spray flow-control of described frame emulsion 5500～6000L/min；
Pressure distribution is controlled according to rolling strategy.
As preferably, described control pressure distribution according to rolling strategy and include:
According to described rolling strategy, described strip steel is rolled；
The pressure load of different rolling sequences is gradually reduced.
As preferably, described rolling strategy includes:
The thickness of described rolling raw material is 2.55～3.25mm；
Described rolling is chill, and thickness is 0.5～0.75mm.
As preferably, described rolling strategy includes:
The thickness of described rolling raw material is 1.45～2.55mm；
Described rolling is chill, and thickness is 0.34～0.50mm.
As preferably, described rolling strategy includes:
The thickness of described rolling raw material is 2.55～3.25mm；
Described rolling is chill, and thickness is 0.34～0.50mm.
As preferably, described rolling strategy includes:
The thickness of described rolling raw material is 3.25～4.25mm；
Described rolling is chill, and thickness is 0.75～1.2mm.
One or more technical schemes provided herein, at least have the following technical effect that or advantage:
Owing to have employed the aperture rationally arranging the anti-tangle baffle plate of frame, the jet flow amount controlling frame emulsion improves frame
Lubrication, controls pressure distribution according to rolling strategy, makes the line bright defect of Cold-strip Steel Surface be well solved.So, have
Effect solves in prior art belt steel surface in the production process of pickling milling train Unit erriger and there is the skill without feel scratches visible
Art problem, it is achieved that avoid belt steel surface in cold-rolled process to produce without feel scratches visible, improve the technique effect of product quality.
Accompanying drawing explanation
The flow chart of the Cold-strip Steel Surface line bright defect control method that Fig. 1 provides for the present invention.
Detailed description of the invention
The embodiment of the present application provides a kind of Cold-strip Steel Surface line bright defect control method, solves or part solves
In prior art, in the production process of pickling milling train Unit erriger there is the technical problem without feel scratches visible in belt steel surface, logical
After rationally arranging the aperture of the anti-tangle baffle plate of frame, the jet flow amount controlling frame emulsion improves the lubrication of frame, according to rolling plan
Slightly control pressure distribution, it is achieved that avoid belt steel surface in cold-rolled process to produce without feel scratches visible, improve product quality
Technique effect.
See accompanying drawing 1, a kind of Cold-strip Steel Surface line bright defect control method that the present invention provides, comprise the following steps:
S1: be opened to anti-tangle for frame baffle plate set aperture；Specifically include: S101: anti-tangle baffle plate is opened to distance work
Make the interval of roller more than 15mm；S102: carry out seal point production after being fully opened by anti-tangle baffle plate.Anti-tangle baffle plate is taked to beat completely
Carrying out the measure of seal point production after opening, surface line bright defect situation can make moderate progress.
S2: the spray flow-control of frame emulsion is being set flow；Frame emulsion set flow as 5500～
6000L/min.The bright line caused after lubrication causes belt steel surface and roll Relative friction crossed by frame emulsion.Real by producing
Trampling discovery, be 6000L/min to 5500L/min by the spray flow-control of frame emulsion, belt steel surface line bright defect obtains bright
Aobvious improvement.
S3: control pressure distribution according to rolling strategy.
Further, control pressure distribution according to rolling strategy to include: according to rolling strategy, strip steel is rolled；Will not
Gradually reduce with the reduction ratio of rolling sequence, effectively prevent the generation of belt steel surface line bright defect.
One of which rolling strategy includes: the thickness of rolling raw material is 2.55～3.25mm；Roll chill thickness be 0.5～
0.75mm.The second rolling strategy includes: the thickness of rolling raw material is 1.45～2.55mm；Roll chill thickness be 0.34～
0.50mm.The third rolling strategy includes: the thickness of rolling raw material is 2.55～3.25mm；Roll chill thickness be 0.34～
0.50mm.4th kind of rolling strategy includes: the thickness of rolling raw material is 3.25～4.25mm；Roll chill thickness be 0.75～
1.2mm。
The Cold-strip Steel Surface line bright defect control method provided the application below by specific embodiment is carried out in detail
Introduce:
S1: the bright line case of surface defects caused for the anti-tangle baffle plate of F4 frame, first gets to anti-tangle baffle plate and works
The position (interval more than 15mm) that roller interval is maximum, carries out seal point production after subsequently anti-tangle baffle plate being fully opened.Take anti-
Twining the measure carrying out seal point production after baffle plate fully opens, surface line bright defect situation makes moderate progress.
S2: cross the bright line caused after lubrication causes belt steel surface and roll Relative friction for F4 frame emulsion.First
The jet flow amount of F4 frame emulsion is dropped to 6000L/min from 6500L/min, and surface line bright defect is not improved, after by F4
The jet flow amount of frame emulsion drops to 5500L/min from 6000L/min again, is obviously improved with rear surface line bright defect.
S3: for owing to reduction ratio is crossed when ambassador's unit roll-force exceedes certain marginal value thus causes roll and strip steel
Scratch, first work out below scheme and carry out comprehensively collecting and statistics of data.
(1) first volume of generation bright line is determined；
(2) producing the first volume of bright line and continuously generating the steel grade of bright line coil of strip, specification, reduction ratio, roll-force and roll
The data such as speed processed are acquired and collect；
(3) by gather and the data that collect by specification, carry out classification by reduction ratio and compare, progressively find out rule therein
After arrive again scene carry out parameters adjust with optimize.
Combing creation data, find produce the bright line overwhelming majority be the thickness of hot rolling raw material at below 4.0mm, roll chill
Thickness is at below 0.8mm, and the thin material of total reduction more than 80%, by each pressure distribution with Synthetic judgment index of scratch mark point
Analysis, in the case of keeping overall reduction, the distribution of the different cut synthetic determination indexs corresponding to pressure distribution is also not
With, corresponding maximum is the most different, and the increase tendency that the cut index of the especially the 4th frame changes along with reduction ratio is the highest.
To this end, start point different rolling sequences, rolling strategy is optimized.
Acid is rolled producing before thin material, is that 11246 (hot rolling is former rolling strategy in first group of sequence number of steel grade of corresponding thin material
The thickness 2.55～3.25mm of material, rolls chill thickness 0.5～0.75mm), rolling strategy 21136 in second group of sequence number of steel grade
(thickness 1.45mm～2.55mm of hot rolling raw material rolls chill thickness 0.34～0.5mm), rolling strategy 21236 (hot rolling raw material
Thickness 2.55mm～3.25mm, roll chill thickness 0.34～0.5mm) and the rolling strategy 21356 (thickness of hot rolling raw material
3.25mm～4.25mm, rolls chill thickness 0.75～1.2mm), these four rolling strategy carry out reduction ratio or pressure load by
Step reduces and optimizes, and after optimization is tracked scene, finds that surface line bright defect eliminates.
One or more technical schemes provided herein, at least have the following technical effect that or advantage:
Owing to have employed the aperture rationally arranging the anti-tangle baffle plate of frame, the jet flow amount controlling frame emulsion improves frame
Lubrication, controls pressure distribution according to rolling strategy, makes the line bright defect of Cold-strip Steel Surface be well solved.So, have
Effect solves in prior art belt steel surface in the production process of pickling milling train Unit erriger and there is the skill without feel scratches visible
Art problem, it is achieved that avoid belt steel surface in cold-rolled process to produce without feel scratches visible, improve the technique effect of product quality.
Above-described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect further
Describe in detail, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, be not limited to this
Bright, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included in the present invention
Protection domain within.
Claims (6)
1. a Cold-strip Steel Surface line bright defect control method, it is characterised in that comprise the following steps:
Anti-tangle for frame baffle plate is opened to the interval of distance working roll more than 15mm；
Seal point production is carried out after being fully opened by described anti-tangle baffle plate；
By the spray flow-control of described frame emulsion 5500～6000L/min；
Pressure distribution is controlled according to rolling strategy.
2. Cold-strip Steel Surface line bright defect control method as claimed in claim 1, it is characterised in that described according to rolling plan
Slightly control pressure distribution to include:
According to described rolling strategy, described strip steel is rolled；
The pressure load of different rolling sequences is gradually reduced.
3. Cold-strip Steel Surface line bright defect control method as claimed in claim 2, it is characterised in that described rolling strategy bag
Include:
The thickness of described rolling raw material is 2.55～3.25mm；
Described rolling is chill, and thickness is 0.5～0.75mm.
4. Cold-strip Steel Surface line bright defect control method as claimed in claim 2, it is characterised in that described rolling strategy bag
Include:
The thickness of described rolling raw material is 1.45～2.55mm；
Described rolling is chill, and thickness is 0.34～0.50mm.
5. Cold-strip Steel Surface line bright defect control method as claimed in claim 2, it is characterised in that described rolling strategy bag
Include:
The thickness of described rolling raw material is 2.55～3.25mm；
Described rolling is chill, and thickness is 0.34～0.50mm.
6. Cold-strip Steel Surface line bright defect control method as claimed in claim 2, it is characterised in that described rolling strategy bag
Include:
The thickness of described rolling raw material is 3.25～4.25mm；
Described rolling is chill, and thickness is 0.75～1.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610590084.8A CN106140827A (en) | 2016-07-25 | 2016-07-25 | A kind of Cold-strip Steel Surface line bright defect control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610590084.8A CN106140827A (en) | 2016-07-25 | 2016-07-25 | A kind of Cold-strip Steel Surface line bright defect control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106140827A true CN106140827A (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610590084.8A Pending CN106140827A (en) | 2016-07-25 | 2016-07-25 | A kind of Cold-strip Steel Surface line bright defect control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110427056A (en) * | 2019-08-06 | 2019-11-08 | 北京首钢冷轧薄板有限公司 | A kind of system and method that air knife edge dam automatically controls |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090106687A (en) * | 2008-04-07 | 2009-10-12 | 현대하이스코 주식회사 | Sticking defect reduction method of cold rolling |
| CN103611732A (en) * | 2013-11-12 | 2014-03-05 | 燕山大学 | Optimization method of technological lubrication system taking galling prevention as objective for tandem cold mill |
-
2016
- 2016-07-25 CN CN201610590084.8A patent/CN106140827A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090106687A (en) * | 2008-04-07 | 2009-10-12 | 현대하이스코 주식회사 | Sticking defect reduction method of cold rolling |
| CN103611732A (en) * | 2013-11-12 | 2014-03-05 | 燕山大学 | Optimization method of technological lubrication system taking galling prevention as objective for tandem cold mill |
Non-Patent Citations (5)
| Title |
|---|
| 刘志亮等: "冷连轧带材表面划痕研究", 《塑性工程学报》 * |
| 尉强等: "可逆冷轧机防缠导板的分析及改进", 《冶金设备》 * |
| 徐俊等: "冷连轧机高速轧制过程中划痕问题的研究", 《上海金属》 * |
| 李光辉: "涟钢冷连轧带钢表面划痕问题的分析及对策", 《上海金属》 * |
| 邱格君等: "1220冷连轧机划痕机理及影响因素分析", 《冶金设备》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110427056A (en) * | 2019-08-06 | 2019-11-08 | 北京首钢冷轧薄板有限公司 | A kind of system and method that air knife edge dam automatically controls |
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Application publication date: 20161123 |
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